Gupta, S. (1999). Sales and distribution management. Excel.
Lua i Stíl Chicago (17ú heag.)Gupta, S. Sales and Distribution Management. New delhi: Excel, 1999.
Lua MLA (9ú heag.)Gupta, S. Sales and Distribution Management. Excel, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.